Right-reduction, or \(R = DV\)  decomposition as it is commonly known, was defined in §REF . We refer to coefficient \(R[ \mathrm {low}_R(p),p]\)  as the pivot entry of matrix \(R\)  in column \(p\) ; these so-called pivot entries are in fact the bona-fide pivot elements of a standardized Gauss-Jordan elimination process on \(D\)  [1]}.
